Stark S-3000 Guide

STARK®S-3000 & S-3000L
Installation, Operation & Maintenance Instructions (IOM)
GENERAL NOTICE
The information provided in this document is very important and needs to be shared with anyone
involved in the installation, operation, and maintenance of the closure(s).
SAFETY NOTICE
Do not open the closure unless you are sure there is no pressure within the closure. All operators
should use the appropriate Personal Protective Equipment (PPE) and operating tools.
WELDING NOTICE
During welding, warpage can occur due to the heat generated. Please read sections 2.2 & 2.3 for
recommendations to reduce warpage caused by welding. Excessive warpage will damage the
product.
STARK®appreciates the support of all supervisors.
Should you have any questions or concerns not addressed in this IOM,
please contact us directly for assistance.
STARK® SOLUTIONS
10650 FM 1484 Rd.
Conroe, TX 77303
Phone [phone]
Email: [e-mail]
www.starksolutions.com
STARK® SOLUTIONS IS ASME “U” & “R” & ISO 9001-2015 CERTIFIED

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Table of Contents
Section 1: INTRODUCTION Page 03
Section 2: INSTALLATION Page 04
Section 2.1: General Installation Notes Page 04
Section 2.2: Installation of Closure Hub in the Field (Manual Welding) Page 04
Section 2.3: Installation of Closure Hub in the Fabrication Shops (Automatic Welding) Page 05
Section 3: OPERATION Page 06
Section 3.1: Opening the Closure (Horizontal) Page 06
Section 3.2: Closing the Closure (Horizontal) Page 07
Section 3.3: Opening & Closing the S-3000/S-3000L Closure (Vertical) Page 09
Section 3.4: Vertical with Wire Rope Winch Page 09
Section 3.5: Vertical with Manual Chain Hoist Page 10
Section 3.6: Vertical with Hydraulic Cylinder w/Pump Page 11
Section 3.7: Vertical with Lifting Eyes Page 12
Section 4: DOOR REMOVAL & INSTALLATION Page 13
Section 4.1: Door Removal Instructions (Horizontal) Page 13
Section 4.2: Door Installation Instructions (Horizontal) Page 14
Section 4.3: Door Removal Instructions (Vertical) Page 14
Section 4.4: Door Installation Instructions (Vertical) Page 15
Section 5: DOOR ADJUSTMENT Page 16
Section 5.1: Horizontal Door Adjustment (Horizontal Hinged) Page 16
Section 5.2: Vertical Door Adjustment (Horizontal Hinged) Page 16
Section 5.3: Horizontal Adjustment (Horizontal Hinged) Page 17
Section 5.4: Door Adjustment (Vertical Hinged) Page 17
Section 6: MAINTENANCE Page 18
Section 6.1: General Maintenance Page 18
Section 6.2: O-rings/Lip seal Maintenance Page 19
Section 6.3: Lock Ring Assembly Maintenance Page 19
Section 6.4: Closure Hub Maintenance Page 21
Section 6.5: Pressure Alert Valve (PAV) Maintenance Page 21
Section 7: REFERENCE DRAWINGS Page 22

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Installation, Operation & Maintenance Instructions for
6” to 84” S-3000 & S-3000L Internal Door Closure
Section 1: INTRODUCTION
The S-3000 Internal Door Closure is manufactured for horizontal
or vertical applications in diameters ranging from 6”to 84”
(DN200 to DN2100), with pressure series ranging from 150 to 2500.
Depending on size and pressure, S-3000 closures come
equipped with a large cross section O-ring or a lip seal. Lip seal
designs are identified as S-3000L. The purpose of this document
is to discuss the installation, operation, and maintenance of the
S-3000/S-3000L Quick Opening Closure.
All closures come equipped with a Pressure Alert Valve (PAV) per
ASME Sec VIII Div. 1 UG-35. The PAV is an integral part of the
opening of the S-3000/S-3000L, as it is attached to a safety
segment of the Lock Ring and must be removed before the Lock
Ring can collapse and the Door can be opened. The PAV design
does not require an O-ring or metal seal ring. In addition, the S-
3000/3000L is a fail-safe design, meaning that even if the Lock
Ring malfunctioned, the Door is still wedged into the Hub.
Opening of the S-3000/S-3000L begins by unscrewing the PAV
stem, then removing the PAV link attached to the safety segment of the locking ring. This allows the
operator to rotate the latch handle, which collapses the Lock Ring sufficiently to disengage from the
Hub. After these steps, the Door and the Lock Ring can be pulled, removing them from the Hub and
opening the Door. Weight bearing components are incorporated to allow for smooth operation
regardless of size or orientation.
Figure 1. S-3000 Horizontal Quick
Opening Closure

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Section 2: INSTALLATION
Section 2.1: General Installation Notes
WARNING: All welding should be performed by qualified welders in accordance with qualified procedures such
as ASME, API, ANSI, etc. These codes require that the welder and the weld procedure be previously qualified.
IMPORTANT: To avoid Hub warpage, complete all nozzle and attachment welds prior to closure installation.
Horizontal closures are designed for installation and operation in the horizontal plane; Door swings in and out
(Figure 2).
Vertical closures are designed for installation and operation in the vertical plane; Door raises and lowers for
opening and closing, respectively (Figure 3).
IMPORTANT: When applying the final paint or coating to the closure, ensure that the Lock Ring and Door ramp is
not painted, as it may hinder the proper operation. A light coating of primer and/or rust preventor is acceptable.
Section 2.2: Installation of Closure in the Field (Manual Welding)
A. Remove the Pressure Alert Valve Stem and Safety Segment from the closure Door.
B. Remove Door, Lock Ring and hinge from the Hub. Refer to Section 4.1 on page 13 for Door removal
instructions for Horizontal closures and Section 4.3 on page 14 for Door removal instructions for Vertical
closures.
C. Fit the Hub to the vessel/pipe. The use of internal or “spider” bracing is recommended, especially on
closures with thinner wall thicknesses.
IMPORTANT: Ensure that the braces are evenly spaced and adhere to the following guidelines depending on
closure size: Up to 30”: 2 braces, Closures 32” to 52”: 3 braces, Closures 54” and larger: 4 braces
D. Weld root and hot passes. The amount of heat should be minimized to avoid possible Hub sealing surface
warpage. A recommended pass sequence is illustrated (Figure 4 on page 05).
Figure 2. Horizontal S-3000
Figure 3. Vertical S-3000

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Section 2.3: Installation of Closure in Fabrication Shops (Automatic Welding)
A. Remove the Pressure Alert Valve Stem and Safety Segment from the closure Door.
B. Remove Door, Lock Ring and hinge from the Hub. Refer to Section 4.1 for Door removal instructions.
C. Fit the Hub to the vessel/pipe. The use of internal or “spider” bracing is recommended, especially on
closures with thinner wall thicknesses.
IMPORTANT: Ensure that the braces are evenly spaced and adhere to the following guidelines depending on
closure size: Up to 30”: 2 braces, Closures 32” to 52”: 3 braces, Closures 54” and larger: 4 braces
D. Weld the root pass. A recommended pass sequence is illustrated (Figure 5).
E. Complete the Hub to vessel/pipe weld using care to minimize heat build up to avoid possible warpage
of the Hub sealing face.
F. Before post weld heat treatment, remove all grease from the Hub. A coating of an anti-splatter product
used for welding will protect against scale build up during the post weld heat treatment.
IMPORTANT: During post weld heat treatment, it is recommended that it be accomplished by localized stress
relieving. If that is not possible, the closure Door and Lock Ring must be removed prior to heat treatment; see
Section 4.1 for Door removal instructions.
G. Close the closure Door (refer to Section 3.2)
Figure 4. Recommended Welding Passes in the field
Figure 5. Recommended Welding Passes in fabrication

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Section 3: OPERATION
All closures are equipped with a Pressure Alert Valve (PAV)
assembly that prevents the Door from being opened while
under internal pressure. The safety segment assembly (Figure
6) consists of the PAV stem, the safety segment, and the PAV
stem Link. The PAV when loosened under pressure, will
generate a whistling noise to alert the operator that the
closure is under pressure. If the pressurizing media is a liquid,
the PAV will leak. The safety segment is connected to the PAV
via the PAV Stem Link and prevents the Lock Ring from being
unlocked while the PAV is installed.
WARNING: Do not attempt to open the closure until all
incoming pressure lines have been closed off and the vessel
or pipe has been relieved of all internal pressure. Opening
under pressure may result in injury to persons and damage to
property.
Section 3.1: Opening the S-3000/S-3000L Closure (Horizontal)
NOTE: Depending on size and pressure, the closure will come equipped with an Activation Bar with a Socket
design, or with a Pivoting Activation Bar design. Both are shown throughout the Horizontal Section of this IOM.
Opening the closure may be performed safely using the following steps:
A. Loosen PAV Stem (if any pressure or residual fluid is
detected, re-tighten the PAV, and do not attempt to
continue opening the closure) and ensure all fluid is
completely drained before continuing. The PAV should
not be used as a vent or drain.
B. Completely remove the PAV stem link and safety
segment from the Door (Figure 6).
C. Rotate the latch approximately 180° counterclockwise
until the Lock Ring is fully collapsed.
D. If the closure is provided with a Pivot Activation Holder
(Figure 7), release the latch on the top hinge plate and
allow the Activation Bar to pivot until it is in the horizontal
position, and pull outward to swing the Door away from
Hub. If the closure does not have the Pivot Activation
Holder, remove the Activation bar from the Activation
Socket (Figure 9 on page 07) and pull outward and swing
the Door away from Hub.
NOTE: Load binders are standard on 24”and larger units with O-rings. If reasonable force will not open the Door,
a load binder may be attached to the activation bar; then extended to assist the Door in opening.
Figure 7. Activation Bar and Pivot
Activation Holder
Figure 6. Latch Assembly & Safety
Segment Assembly

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Section 3.2: Closing the S-3000/S-3000L Closure (Horizontal)
Closing the closure may be performed using the following steps:
A. Wipe off all sealing contact surfaces and ensure all debris and corrosion has been removed. Regrease
the Hub, sealing surface and sealing surface ramp (Figure 22 & 23 on page 18) with a light to medium
lithium grease.
B. Visually inspect O-ring/lip seal for any damage including tears, excessive wear, swell, etc. If breaks or tears
are present, the O-ring/lip seal must be replaced to ensure reliability during operation.
C. Ensure O-ring/lip seal groove is free from corrosion. Re-lubricate if necessary.
D. Release latch and allow the Activation Bar to pivot until it is in the horizontal position, as shown in (Figure
8).
E. Push the Activation Bar inward and carefully swing Door into Hub.
F. Ensure Door is completely seated equally against the Hub prior to compressing the O-ring/lip seal.
Figure 9. Load Binder, Activation Bar & Activation Socket
Figure 8. Load Binder, Activation Bar & Pivot Activation Holder

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G. Using the Activation Bar for leverage, give a fast, quick push to ensure the O-ring/lip seal is compressed
and the Lock Ring is in place. If the Closure is 24” and larger, use the load binder (Figure 8) to assist with
compression.
H. Rotate latch handle to expand locking ring.
IMPORTANT: If Lock Ring does not fit into its internal Hub groove, DO NOT apply force. Verify that the Door is fully
closed, reposition and reattempt.
I. Insert PAV stem into threaded PAV Body in Door while placing the safety segment into the Lock Ring gap.
J. Tighten the PAV Stem by hand, then finish by adding one eighth of a turn using an adjustable wrench. Do
not overtighten.
K. Return the Activation Bar to its vertical position and engage the latch to ensure it stays upright in the Pivot
Activation Holder.
NOTE: If a load binder assist is used, ensure load binder is disengaged as shown in Figure 10 when pressurizing.
Failure to do so will result in damage to the load binder and/or Activation Bar.
WARNING: Do not place hand between the Hub, Door, Lock Ring or hinging while actuating the closure.
Figure 10. Activation Bar Returned to
Upright Position and Load Binder Disengaged
Figure 11. Activation Bar Placed Back into
Activation Holder and Load Binder Disengaged

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Section 3.3: Opening & Closing the S-3000/S-3000L Closure (Vertical)
Vertical closures may come equipped with a Wire Rope Winch (Section 3.4), Chain Hoist (Section 3.5),
Hydraulic Cylinder with pump (Section 3.6), or with Lifting Eyes only (Section 3.7). Follow the below steps, then
see the appropriate section for opening and closing instructions based on the lifting device that was provided.
•Loosen PAV Stem (if any pressure or residual fluid is detected, re-tighten the PAV, and do not attempt to
continue opening the closure). Ensure all fluid is completely drained before continuing. The PAV should
not be used as a vent or drain.
•Completely remove the PAV stem link and safety segment from the Door.
•Rotate the latch handle approximately 180° counterclockwise until the Lock Ring is fully collapsed.
Section 3.4: Wire Rope Winch
A wire rope winch and davit assembly that have a hand operated winch are mounted to a post coming from
the side of the closure.
A. Once the Lock Ring has collapsed, the handle of the winch is turned, winding up the wire, causing the
Door to lift free from the Hub. The winch has a braking system built in, so that when the handle stops
rotating, the load is held in the same position.
B. Once the Door is an inch or more above the Hub, the whole davit assembly (Door included) can be
rotated out of the way for access inside the closure.
C. Wipe off all sealing contact surfaces and ensure all debris and corrosion has been removed. Regrease
the Hub, sealing surface and sealing surface ramp with a light to medium lithium grease.
D. Visually inspect O-ring/lip seal for any damage including tears, excessive wear, swell, etc. If breaks or
tears are present, the O-ring/lip seal must be replaced to ensure reliability during operation.
E. Ensure O-ring/lip seal groove is free from corrosion. Relubricate if necessary.
F. To replace the Door, rotate the davit assembly so that the Door is centered over the closure opening,
and rotate the handle of the winch in the opposite direction, lowering the Door.
IMPORTANT: WHEN LOWERING THE DOOR INTO THE HUB, ENSURE ALL PERSONNEL ARE AT A SAFE DISTANCE TO
AVOID HAZARD OR INJURY!
G. Once the Door is lowered into the Hub, insert the provided handle into the Hub receiver, and push
down, providing leverage to compress the O-ring. If the closure in question has a lip seal, no
compressive leverage will be needed.
H. Rotate latch handle to expand locking ring.
Figure 12. S-3000 with Wire Rope Winch –Door raised and Lowered

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NOTICE: If Lock Ring does not fit into its internal Hub groove, DO NOT apply force. Verify that the Door is fully
closed, reposition and reattempt.
I. Insert PAV stem into threaded PAV Body in Door while placing safety segment into the Lock Ring gap.
J. Tighten the PAV Stem by hand, then finish by adding one eight of a turn using an adjustable wrench. Do
not overtighten.
Section 3.5: Manual Chain Hoist
A load bearing chain and hook assembly hangs below a gearbox with a smaller operation chain hanging off
the side of the gearbox. As the operator pulls on the operation chain, the gearbox translates the motion into
raising or lowering of the load bearing chain assembly.
The gearbox can rotate completely around, allowing the operator to stand in any position around the closure,
but the operation chain is only long enough to reach close to the top of the Hub, so the operator must be at
the height of the top of the closure.
A. Once the Lock Ring has been collapsed, the operator may pull on the operation chain, raising the
Door.
B. When the Door is an inch or more above the Hub, use the activation bar for leverage and move the
whole davit assembly (Door included) so that the operator can access inside the closure.
C. Once the Door is out of the way of the Hub, tighten the T-handle at the davit base to ensure the Door
stays in place (away from the operator).
D. Wipe off all sealing contact surfaces and ensure all debris and corrosion has been removed. Regrease
the Hub, sealing surface and sealing surface ramp with a light to medium lithium grease.
E. Visually inspect O-ring/lip seal for any damage including tears, excessive wear, swell, etc. If breaks or tears
are present, the O-ring/lip seal must be replaced to ensure reliability during operation.
F. Ensure O-ring/lip seal groove is free from corrosion. Relubricate if necessary.
G. To replace the Door, rotate the davit assembly so that the Door is centered over the closure opening,
and pull the operation chain in the opposite direction, lowering the Door.
IMPORTANT: WHEN LOWERING THE DOOR INTO THE HUB, ENSURE ALL PERSONNEL ARE AT A SAFE DISTANCE TO
AVOID HAZARD OR INJURY!
Figure 13. S-3000 with Manual Chain Hoist –Door Raised and Lowered

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H. As the Door is lowered into the Hub, the weight of the Door will cause the O-ring/lip seal to compress on
its own.
I. Rotate latch handle to expand locking ring.
NOTICE: If Lock Ring does not fit into its internal Hub groove, DO NOT apply force. Verify that the Door is fully
closed, reposition and reattempt.
J. Insert PAV stem into threaded PAV Body in Door while placing safety segment into the Lock Ring gap.
K. Tighten the PAV Stem by hand, then finish by adding one eight of a turn using an adjustable wrench. Do
not overtighten.
Section 3.6: Hydraulic Cylinder w/Pump
The hydraulic cylinder w/pump is a hand operated lever pump, like a bottle jack pump. By repeatedly
pumping the handle, the hydraulic cylinder is retracted into the cylinder body, lifting the Door. Cylinder, hose,
fittings, valves, and pump are provided.
The hydraulic pump is located on the davit assembly, near where it is welded to the Hub. To operate the
pump, ensure the pump’s valve has been closed and that there is an adequate amount of oil in the pumps
reservoir prior to opening the Door. The hydraulic cylinder is rated for 3000PSI, and Simplex Hydraulic 150 oil is
recommended.
A. Once the Lock Ring has been collapsed, start operating the pump. After 10-15 pumps, the hydraulic
cylinder will start contracting, taking the weight of the Door.
B. Continue pumping until the Door is within reach of the safety chains.
C. Connect the safety chains to the additional lifting eyes welded to the Door by using the provided lifting
shackles on the ends of the chains. These will guarantee that in the event of hydraulic failure, the Door
cannot lower more than the chains allow.
D. With the safety chains connected, and the Door is an inch or more above the Hub, use the activation
bar for leverage and move the whole davit assembly (Door included) so that the operator can access
inside the closure.
E. Once the Door is out of the way of the Hub, tighten the T-handle at the davit base to ensure the Door
stays in place (away from the operator).
F. Wipe off all sealing contact surfaces and ensure all debris and corrosion has been removed. Regrease
the Hub, sealing surface and sealing surface ramp with a light to medium lithium grease.
G. Visually inspect O-ring/lip seal for any damage including tears, excessive wear, swell, etc. If breaks or
tears are present, the O-ring/lip seal must be replaced to ensure reliability during operation.
H. Ensure O-ring/lip seal groove is free from corrosion. Relubricate if necessary.
Figure 14. S-3000 With Hydraulic Cylinder w/ Pump –Door Raised and Lowered

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I. To replace the Door, loosen the T-handle and use the Activation Bar to rotate the davit assembly so that
the Door is centered over the closure opening.
J. Return the Activation Bar to its holder.
K. Disconnect the safety chains. You may have to pump the handle more to raise the Door to slacken the
chains.
L. Slowly open the pump’s valve, allowing the hydraulic fluid to return to the pump, lowering the Door.
IMPORTANT: WHEN LOWERING THE DOOR INTO THE HUB, ENSURE ALL PERSONNEL ARE AT A SAFE DISTANCE TO
AVOID HAZARD OR INJURY!
M. As the Door is lowered into the Hub, the weight of the Door will cause the O-ring/lip seal to compress on
its own.
N. Rotate latch handle to expand locking ring.
NOTICE: If Lock Ring does not fit into its internal Hub groove, DO NOT apply force. Verify that the Door is fully
closed, reposition and reattempt.
O. Insert PAV stem into threaded PAV Body in Door while placing safety segment into the Lock Ring gap.
P. Tighten the PAV Stem by hand, then finish by adding one eight of a turn using an adjustable wrench. Do
not overtighten.
Section 3.7: Lifting Eyes Only
A. Once the Lock Ring has been collapsed, the appropriately rated customer-provided lifting device can
be put into position to lift the Door from the center lifting eye.
B. Once the Door is an inch or more above the Hub, the Door assembly can be removed to another location
while the closure is accessed. Preferably a clean and dry location.
C. Wipe off all sealing contact surfaces and ensure all debris and corrosion has been removed. Regrease
the Hub, sealing surface and sealing surface ramp with a light to medium lithium grease.
D. Visually inspect O-ring/lip seal for any damage including tears, excessive wear, swell, etc. If breaks or
tears are present, the O-ring/lip seal must be replaced to ensure reliability during operation.
E. Ensure O-ring/lip seal groove is free from
corrosion. Relubricate if necessary.
F. To replace the Door, lift the Door with the
lifting device, and place it over the Hub,
centered, and lower into the Hub.
G. As the Door is lowered into the Hub, the
weight of the Door will cause the O-ring/lip
seal to compress on its own.
H. Rotate latch handle to expand locking ring.
NOTICE: If Lock Ring does not fit into its internal Hub groove, DO NOT apply force. Verify that the Door is fully
closed, reposition and reattempt.
I. Insert PAV stem into threaded PAV Body in Door while placing safety segment into the Lock Ring gap.
J. Tighten the PAV Stem by hand, then finish by adding one eight of a turn using an adjustable wrench. Do
not overtighten.
IMPORTANT: WHEN LOWERING THE DOOR INTO THE HUB, ENSURE ALL PERSONNEL ARE AT A SAFE DISTANCE TO AVOID
HAZARD OR INJURY!
K. Now the lifting device may be removed from the closure.
Figure 15. S-3000 with Lifting Eyes –Raised and Lowered

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Section 4: DOOR REMOVAL & INSTALLATION
Section 4.1: Door Removal Instructions (Horizontal)
A. Loosen PAV Stem (Figure 16). If any pressure or
residual fluid is detected, re-tighten the PAV, and do
not attempt to continue opening the closure. Ensure
all fluid is completely drained before continuing.
B. Completely remove the PAV Stem and safety
segment from the Door.
C. Rotate the latch handle approximately
180° counterclockwise until the Lock Ring is fully
collapsed.
D. Using the Activation Bar in the Pivot Activation Holder
or Activation Bar Socket (Figure 8 & 9 on page 07) pull
the Door outward and swing the Door away from Hub.
E. Once open, there is a tapped hole(s) on top of the Door diameter. This is designed to allow a threaded
lifting eye(s) to be inserted and is used to aid in the lifting of the Door. A lifting eye where the ring pivots
is preferred. Depending on the weight of the closure Door, the lifting eye size will vary. All lifting eye sizes
are Standard coarse thread. Lifting eye sizes used are below:
•1/4” - 20
•5/16” - 18
•3/8” - 16
•1/2” -13
•5/8” - 11
•3/4” - 10
•7/8” - 9
•1” - 8
•1 1/4” - 7
•1 3/8” – 6
F. After placing the lifting eye(s) in the tapped hole(s), an appropriately rated lifting device is to be
attached to take weight off the Door, removing as much stress from the hinging as possible.
G. Remove hinge bolts (Figure 17) from upper and lower Hub hinge arms.
H. Door is ready to be removed from Hub.
I. Place Door and hinge in a clean, dry area; or on a raised surface such as a pallet.
Figure 16. PAV Assembly
Figure 17. Hinge Detail View

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Section 4.2: Door Installation Instructions (Horizontal)
A. Place a lifting ring in the tapped hole in the top of the Door. Lift the Door and hinge assembly using an
appropriately rated lifting device.
B. Position the Door such that the hinge arm holes align with the Hub hinge block holes. Insert hinge bolt in
upper and lower Hub hinge block (hinge blocks are welded to Hub). Replace bearings or bushings as
seen prior to disassembly.
C. Close the Door, see Operation (Section 3.2 on page 07) for closing instructions.
D. See Door Adjustment (Section 5 on page 16) for proper Door
adjustment.
Section 4.3: Door Removal Instructions (Vertical)
A. Loosen PAV Stem (Figure 18). If any pressure or residual fluid is
detected, re-tighten the PAV, and do not attempt to continue
opening the closure. Ensure all fluid is completely drained before
continuing.
B. Completely remove the PAV Stem and safety segment from the
Door.
C. Rotate the latch handle approximately 180° counterclockwise
until the Lock Ring is fully collapsed.
NOTE: If the closure is received fully assembled, with the davit inserted into to the socket assembly welded to the
closure Hub (Figure 19), then the closure’s lifting device must be disconnected from the Door prior to lifting the
davit assembly out of the socket assembly.
D. Using an appropriately rated lifting device, lift the Door out of the closure Hub. On closures with a bracket
assembly (Figure 20), the davit base is bolted to a bracket assembly (Figure 20), which is welded to the
Hub. After lifting the davit base out of the socket assembly, the bolts holding the bracket assembly to the
Hub must be removed and the socket assembly removed prior to post weld heat treat.
E. Place Door and hinge in a clean, dry area; or on a raised surface such as a pallet.
Figure 20. Bracket Assembly (Vertical)
Figure 19. Hinge Detail View (Vertical)
Figure 18. PAV Assembly

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Section 4.4: Door Installation Instructions (Vertical)
F. Using an appropriately rated external lifting device, hook the lifting eye at the center of the Door and
lower into the closure Hub.
G. Securely place the lifting device around the davit arm at gusset (if provided) and guide the davit
assembly into the socket assembly (Figure 19 on page 14).
H. Place the hook or pin attached to the closure lifting device in the lifting eye at the center of the closure
Door.
I. Close the Door, see Operation (Section 3.3 on page 08) for closing instructions.

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Section 5: DOOR ADJUSTMENT
Section 5.1: Horizontal Door Adjustment (Horizontal Hinged)
Centering the Door is essential for proper functioning of the closure. A properly centered Door should resemble
(Figure 21)where the Door and Hub centers are equal. If the Door is not centered as shown in (Figure 22),
vertical/horizontal adjustment must be made. See adjustable hinge bolts (Figure 23).
Figure 21. Centered Door Figure 22. Door Off Center
Section 5.2: Vertical Door Adjustment (Horizontal Hinged)
A. Place Door in Hub (with O-ring removed)
B. Using a wrench, hold onto the hex of the adjustment bolt (top). Loosen the upper jam nut. Using another
wrench, hold on to the lower jam nut to raise or lower the Door. (Figure 23)
C. Once the Door is adjusted, re-tighten the adjustable upper jam nut.
Figure 23. Adjustable Hinge Bolt

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Section 5.3: Horizontal Adjustment (Horizontal Hinged)
A. Place Door in Hub (with O-ring removed)
B. Position 0.094” shims between the Door and Hub at 5 & 7 o’clock (Door may need to be adjusted vertically
to do so)
C. Loosen but DO NOT REMOVE the 4 Door hinge bolts (Figure 23) such that Door is free to rest on the shims
placed between the Door and Hub (Door may require vertical adjustment during the process)
D. Re-tighten head hinge bolts.
Section 5.4: Door Adjustment (Vertical Hinged)
Vertical Doors are raised and lowered from the Hub and require no adjustment; they are self-centering upon
insertion.

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Section 6: MAINTENANCE
Section 6.1: General Maintenance
•Inspect all closure contact surfaces for corrosion, cleaning as required, prior to closing.
•Grease Door Ramp, Seal Gland, and all Hub Contact Surfaces (Figure 24 & 25)
•Inspect the Seal for any damage, such as or nicks or cuts.
•Ensure all Pressure Alert Valve (PAV) threads are free from damage and debris.
Figure 24. Hub Contact Surfaces (one-piece lock ring)
Figure 25. Hub Contact Surfaces (segmented lock ring)

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Section 6.2: O-ring/Lip seal Maintenance
An FKM O-ring is provided as a standard with all closures, but always
ensure material compatibility with the product going through the
application. Should the O-ring/lip seal material not be suitable, it could
swell and cause the closure to not seal properly or make the operation
difficult.
•Inspect the O-ring/seal for rough surfaces, nicks, or cuts. If any
defects are found, replace it with an O-ring/seal from Stark®to
ensure the dimensional integrity.
•Clean new or re-used O-ring/lip seal, lubricate them lightly and
place them in the O-ring/Seal groove (Figure 26).
Section 6.3: Lock Ring Assembly Maintenance
Depending on your closure size and pressure, you may have a solid Lock Ring or a segmented locking ring (Figure
27).
Open the closure by following the steps in Section 3.1.
•Unscrew the PAV stem and remove the PAV link and
safety segment.
•Remove latch assembly from Lock Ring assembly by
removing the bolts at the top and bottom (Figure 28)
•Carefully place latch assembly in a clean, dry location.
Figure. 28 Latch Assembly
Figure 26. O-ring & O-ring Groove
Figure. 27 Lock Ring styles
O-RING
O-RING
GROOVE

Document No : CMM.3000.108 Version : 22.031 Rev 07
20
•Once the PAV stem, PAV link, safety segment
and latch assembly are removed you will
have a gap in the locking ring, as shown,
(Figure 29).
•Using a crescent wrench, loosen the Lock Ring
Holding Clip bolts (Figure 30)and turn the
Holding Clips so they are facing away from the
from the Lock Ring .
•On a horizontal application, use both hands,
move the Lock Ring so that the open portion
(where the latch assembly was) is at the
bottom on the closure Door (6 o’clock
position). In vertical applications, no rotation is
necessary.
•Carefully lift the Lock Ring assembly from the
open Door and rest on the Hinge Assembly.
•Clean the Stainless-Steel Lock Ring contact
surfaces to ensure there is no debris, grease, or
paint. Take care to remove any debris on the
inner surface of the locking ring.
Accumulations and moderate surface
corrosion can be removed by hand sanding
affected areas with fine grit sandpaper.
•Apply a light coating of grease to the Lock
Ring contact surface (Figure 31).
•Return the Lock Ring Assembly to the Door
ensuring the open ends of the Lock Ring
Assembly are positioned between the welded
stops on the Door (Figure 29).
•Return the Holding Clips to their previous
location (facing the Lock Ring) and tighten the
bolts using a crescent wrench.
•Replace the Latch Assembly by tightening the
top and bottom bolt.
•Rotate the Lock Ring Latch Assembly
counterclockwise to contract the Lock Ring
Assembly to the open position.
Figure. 31 Lock Ring Contact Surface
Figure. 30 Lock Ring Holding Clips
Figure. 29 Removed & Installed Latch Assembly